package com.sky.service.impl;

import com.fasterxml.jackson.databind.util.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /*新增套餐*/
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //把套餐基本信息插入套餐表
        setmealMapper.insert(setmeal);
        //获取套餐的id
        Long setmealId = setmeal.getId();
        //把菜品全部插入这个套餐中,在这些菜品中的所属套餐里面添加套餐id
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /*套餐分页查询*/
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /*批量删除套餐*/
    @Override
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);//补充根据id查询套餐内容
            //套餐处于起售状态，不能删除
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        //删除套餐
        ids.forEach(setmealId -> {
            setmealMapper.deleteById(setmealId);//删除套餐表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);//删除套餐菜品关系表中的数据
        });

    }

    /*修改套餐——根据id查询套餐*/
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        //除了得到套餐还需要把菜品也找出来
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);//根据套餐id获取套餐的菜品

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);//添加菜品
        return setmealVO;
    }

    /*修改套餐——修改提交*/
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //修改套餐表，修改基本信息
        setmealMapper.update(setmeal);

        //获取套餐的id
        Long setmealId = setmealDTO.getId();

        //删除套餐和菜品之间的关联关系
        setmealDishMapper.deleteBySetmealId(setmealId);
        //重新设置每一个菜品所属于的套餐
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //插入套餐和菜品的关联
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /*启售和停售*/
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if (status == StatusConstant.ENABLE) {
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if (dishList != null && dishList.size() > 0) {
                dishList.forEach(dish -> {
                    if (StatusConstant.DISABLE == dish.getStatus()) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal=Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }
}
